Kalkulator is an advanced calculation software program designed for scientists and engineers. It's safe to assume that this is the most advanced scientific calculator available for Microsoft's operating system.The software program includes over 100 calculating and evaluating functions, whether it's standard functions which can be found in any basic calculator and whether it's advanced user defined functions and expressions.The most popular feature offered is the ability to build user defined complex conditioned expressions and enter appropriate values. After computing the value users can modify expressions or results.The calculator also includes computer math (binary, octal, hex), physical constants and much more.More advanced users can enjoy more complex mathematical actions like integrals, numerical integration and differentiation, interpolation, algorithms, linear and none linear graphs, matrixes and vectors which become incredibly simple using Kalkulator.The fact that Kalkulator is capable of such advanced calculations does not hamper its ability to be useful to users' basic needs. It requires little system resources and is convenient to any user.The calculator had been developed and made compatible with every operating system in the last fifteen years and had been continuously improved and upgraded during that time.